Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/core.c: TIPC module code | |
3 | * | |
9da1c8b6 | 4 | * Copyright (c) 2003-2006, Ericsson AB |
13a2e898 | 5 | * Copyright (c) 2005-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
b97bf3fd | 37 | #include "core.h" |
b97bf3fd | 38 | #include "ref.h" |
b97bf3fd PL |
39 | #include "name_table.h" |
40 | #include "subscr.h" | |
41 | #include "config.h" | |
cc79dd1b | 42 | #include "port.h" |
b97bf3fd | 43 | |
2cf8aa19 | 44 | #include <linux/module.h> |
b97bf3fd | 45 | |
b97bf3fd | 46 | /* global variables used by multiple sub-systems within TIPC */ |
61cdd4d8 | 47 | int tipc_random __read_mostly; |
b97bf3fd | 48 | |
b97bf3fd | 49 | /* configurable TIPC parameters */ |
61cdd4d8 YX |
50 | u32 tipc_own_addr __read_mostly; |
51 | int tipc_max_ports __read_mostly; | |
61cdd4d8 YX |
52 | int tipc_net_id __read_mostly; |
53 | int tipc_remote_management __read_mostly; | |
cc79dd1b | 54 | int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */ |
b97bf3fd | 55 | |
3032cca4 | 56 | /** |
31e3c3f6 | 57 | * tipc_buf_acquire - creates a TIPC message buffer |
3032cca4 AS |
58 | * @size: message size (including TIPC header) |
59 | * | |
60 | * Returns a new buffer with data pointers set to the specified size. | |
61 | * | |
62 | * NOTE: Headroom is reserved to allow prepending of a data link header. | |
63 | * There may also be unrequested tailroom present at the buffer's end. | |
64 | */ | |
31e3c3f6 | 65 | struct sk_buff *tipc_buf_acquire(u32 size) |
3032cca4 AS |
66 | { |
67 | struct sk_buff *skb; | |
68 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; | |
69 | ||
70 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); | |
71 | if (skb) { | |
72 | skb_reserve(skb, BUF_HEADROOM); | |
73 | skb_put(skb, size); | |
74 | skb->next = NULL; | |
75 | } | |
76 | return skb; | |
77 | } | |
78 | ||
b97bf3fd | 79 | /** |
4323add6 | 80 | * tipc_core_stop_net - shut down TIPC networking sub-systems |
b97bf3fd | 81 | */ |
31e3c3f6 | 82 | static void tipc_core_stop_net(void) |
b97bf3fd | 83 | { |
4323add6 | 84 | tipc_net_stop(); |
6e967adf | 85 | tipc_bearer_cleanup(); |
b97bf3fd PL |
86 | } |
87 | ||
88 | /** | |
89 | * start_net - start TIPC networking sub-systems | |
90 | */ | |
03194379 | 91 | int tipc_core_start_net(unsigned long addr) |
b97bf3fd PL |
92 | { |
93 | int res; | |
94 | ||
379c0456 | 95 | tipc_net_start(addr); |
6e967adf | 96 | res = tipc_bearer_setup(); |
a29a194a PM |
97 | if (res < 0) |
98 | goto err; | |
99 | return res; | |
100 | ||
101 | err: | |
102 | tipc_core_stop_net(); | |
b97bf3fd PL |
103 | return res; |
104 | } | |
105 | ||
106 | /** | |
4323add6 | 107 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
b97bf3fd | 108 | */ |
31e3c3f6 | 109 | static void tipc_core_stop(void) |
b97bf3fd | 110 | { |
4323add6 PL |
111 | tipc_netlink_stop(); |
112 | tipc_handler_stop(); | |
113 | tipc_cfg_stop(); | |
114 | tipc_subscr_stop(); | |
4323add6 PL |
115 | tipc_nametbl_stop(); |
116 | tipc_ref_table_stop(); | |
117 | tipc_socket_stop(); | |
cc79dd1b | 118 | tipc_unregister_sysctl(); |
b97bf3fd PL |
119 | } |
120 | ||
121 | /** | |
4323add6 | 122 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
b97bf3fd | 123 | */ |
31e3c3f6 | 124 | static int tipc_core_start(void) |
b97bf3fd PL |
125 | { |
126 | int res; | |
127 | ||
b97bf3fd | 128 | get_random_bytes(&tipc_random, sizeof(tipc_random)); |
b97bf3fd | 129 | |
2db9983a AS |
130 | res = tipc_handler_start(); |
131 | if (!res) | |
132 | res = tipc_ref_table_init(tipc_max_ports, tipc_random); | |
133 | if (!res) | |
134 | res = tipc_nametbl_init(); | |
2db9983a AS |
135 | if (!res) |
136 | res = tipc_netlink_start(); | |
137 | if (!res) | |
138 | res = tipc_socket_init(); | |
cc79dd1b YX |
139 | if (!res) |
140 | res = tipc_register_sysctl(); | |
13a2e898 YX |
141 | if (!res) |
142 | res = tipc_subscr_start(); | |
7d0ab17b YX |
143 | if (!res) |
144 | res = tipc_cfg_init(); | |
2db9983a | 145 | if (res) |
4323add6 | 146 | tipc_core_stop(); |
2db9983a | 147 | |
b97bf3fd PL |
148 | return res; |
149 | } | |
150 | ||
b97bf3fd PL |
151 | static int __init tipc_init(void) |
152 | { | |
153 | int res; | |
154 | ||
2cf8aa19 | 155 | pr_info("Activated (version " TIPC_MOD_VER ")\n"); |
b97bf3fd PL |
156 | |
157 | tipc_own_addr = 0; | |
158 | tipc_remote_management = 1; | |
ee983ac7 | 159 | tipc_max_ports = CONFIG_TIPC_PORTS; |
b97bf3fd PL |
160 | tipc_net_id = 4711; |
161 | ||
cc79dd1b YX |
162 | sysctl_tipc_rmem[0] = CONN_OVERLOAD_LIMIT >> 4 << TIPC_LOW_IMPORTANCE; |
163 | sysctl_tipc_rmem[1] = CONN_OVERLOAD_LIMIT >> 4 << | |
164 | TIPC_CRITICAL_IMPORTANCE; | |
165 | sysctl_tipc_rmem[2] = CONN_OVERLOAD_LIMIT; | |
166 | ||
2db9983a AS |
167 | res = tipc_core_start(); |
168 | if (res) | |
2cf8aa19 | 169 | pr_err("Unable to start in single node mode\n"); |
c4307285 | 170 | else |
2cf8aa19 | 171 | pr_info("Started in single node mode\n"); |
c4307285 | 172 | return res; |
b97bf3fd PL |
173 | } |
174 | ||
175 | static void __exit tipc_exit(void) | |
176 | { | |
4323add6 PL |
177 | tipc_core_stop_net(); |
178 | tipc_core_stop(); | |
2cf8aa19 | 179 | pr_info("Deactivated\n"); |
b97bf3fd PL |
180 | } |
181 | ||
182 | module_init(tipc_init); | |
183 | module_exit(tipc_exit); | |
184 | ||
185 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); | |
186 | MODULE_LICENSE("Dual BSD/GPL"); | |
a592ea63 | 187 | MODULE_VERSION(TIPC_MOD_VER); |